K 10
svn:author
V 7
git2svn
K 8
svn:date
V 27
2022-03-08T07:13:27.292692Z
K 7
svn:log
V 591
cam: don't lock while handling an AC_UNIT_ATTENTION

Don't take the device_mtx lock in daasync() when handling an
AC_UNIT_ATTENTION. Instead, assert the lock is held before modifying the
periph's softc flags.

The device_mtx lock is taken in xptdevicetraverse() before daasync()
is eventually called in xpt_async_bcast().

PR:             240917, 226510, 226578
Reviewed by:    imp
Differential Revision: https://reviews.freebsd.org/D27735

(cherry picked from commit bb8441184bab60cd8a07c2b94bd6c4ae8b56ec25)

Git Hash:   1987ff8abca2c9bdff7f385ea2fd1c60cf5b3aeb
Git Author: rew@FreeBSD.org
END